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Questions
21. In frame structure, what transfers the load to columns?
foundation
slabs
beams
roofs
22. Hole kept in a retaining wall for seepage of water is-
Brick hole
Weep hole
Steam hole
Black hole
ব্যাখ্যা: Weep hole রিটেইনিং ওয়ালে ড্রিল করা একটি ছিদ্র, যা রিটেইনিং ওয়ালের অভ্যন্তরস্থ পানি নির্গমনে সহায়তা করে।
23. A wall built to resist the pressure of earth filling, is known as-
retaining wall
breast wall
shoring
buttress
24. What is the hook length for steel reinforcement of diameter d?
2d
6d
9d
16d
25. The width of bearing plate is--- the width of the flange of column.
equal to
greater than
less than
none of these
26. Allowable working stress compression in the column splice plate may be taken as-
60 N/mm²
80 N/mm²
100 N/mm²
125 N/mm²
27. The common section used in lacing, is-
rolled steel flat
rolled angle
rolled channel
all of these
28. The lateral system used in built-up columns, to carry the transverse shear force, is-
lacing
perforated plates
batten plates
any one of these
29. An eccentrically loaded column is subjected to-
bending stress
direct stress
shear stress
both a and b
30. The bending stress in a beam at neutral axis is-
zero
maximum
minimum
none
ব্যাখ্যা: There is no load acting on neutral axis so bending stress on the neutral axis is zero, but shear stress are maximum at neutral axis.
31. Slenderness ratio of the lacing bar for compression member should not exceed-
125
145
135
155
ব্যাখ্যা: As per IS 800 Design specification of lacing are: 1. The angle of inclination of the lacing with the longitudinal axis of the column should be between 40° to 70° 2. Slenderness ratio of lacing bar should not exceed 145.
32. In a grillage footing, the maximum bending moment occurs at the-
edge of beam
centre of beam
edge of base
plate none of these
33. The effective length of a battened columns should be increased by-
5%
10%
15%
20%
ব্যাখ্যা: Shear deformation effect নেওয়ার জন্য কলামে বেটেনস ব্যবহার করা হয়। Lacing members-এর তুলনায় Batens ব্যবহারে শিয়ার ডিফরমেশন বৃদ্ধি পায়, তাই 10% হারে কার্যকরী দৈর্ঘ্য বৃদ্ধি করা লাগে।
34. The factor of safety due to sliding of the retaining wall is generally taken as-
1
2
4
1.5
ব্যাখ্যা: স্লাইডিং-এর জন্য Factor of safety 1.5 হতে 2 পর্যন্ত ধরা হয়।
35. The spacing of stirrups in a rectangular beam is-
kept constant throughout the beam
decrease towards the centre of the beam
increase at the ends
increase at the centre of the beam
ব্যাখ্যা: Maximum spacing of vertical stirrups in a rectangle beam is at its midspan. It's because the shear force at the midspan is very less. The spacing of vertical stirrups is minimum near the supports due to maximum shear force at the supports.
36. The columns whose slendeness ratio is less than 80, are known as-
short columns
long columns
weak columns
medium columns
ব্যাখ্যা: When the columns slendeness ratio is less than 80 is called short column and columns slendeness ratio is greater than 80 is called long column. It is generally fails by buckling.
37. The shear reinforcement in RCC is provided to resist-
vertical shear
horizontal shear
diagonal compression
diagonal tension
ব্যাখ্যা: Reinforcement which is designed to resist shear or diagonal tension stresses. Shear reinforcement is usually provided in the form of stirups to hold the longitudinal reinforcement and also to take the shear to which the structure is subjected to
38. In a grillage footing, the maximum shear force occurs at the edge of base plate.
Right
Wrong
39. A single triangular system is formed in the case of-
single lacing
double lacing
both a and b
none of these
40. Shell structure does not have any-
bending moment
shear stress
tensile stress
compressive stress
ব্যাখ্যা: Shell structure মূলত RCC নির্মিত পাতলা বাঁকানো প্লেট কাঠামো বিশেষ। এটি দেখতে আঁচ- এর মতো বাঁকানো। এটি কাঠামোর টেনসাইল, শিয়ার পীড়ন এবং চাপ প্রতিরোধ করতে সক্ষম কিন্তু এতে কোনো রকম বেন্ডিং মোমেন্ট উৎপন্ন হয় না।